Self-Test B-4.4 Distribution System Installation
Complete Self-Test B-4.4 and check your answers.
Match the definitions in Column B to the correct term in Column A:
| Column A | Column B |
| 1. Riser | a. The horizontal pipe that connects a main to a riser |
| 2. Runout | b. A run of pipe with three or more elbows that allow parts of a run to have different slopes and movement without severe stress |
| 3. Spring piece | c. A pipe that connects a heat transfer unit to other parts of a heating system |
| 4. Swing connection | d. An arrangement of pipes and fittings that allows the movement caused by thermal expansion to occur within parts of a piping run without causing excessive stress |
| 5. Expansion loop | e. A vertical pipe connected to runouts on more than one floor |
| f. A vertical pipe in a runout that passes down to a heat transfer unit on a lower level | |
| g. A vertical pipe in a runout that passes up through a floor up to a heat transfer unit |
- Complete the following statement: “Piping runs in a hot-water heating system should ________________.”
- Be almost level or have an upward grade of 4 mm/m ([latex]\tfrac{1}{2}[/latex] in./10 ft)
- Slope down in the direction of the flow
- Slope down from the supply pipes and up to the returns
- Slope up from the supply pipes and down to the returns
- What are the fittings in a swing connection?
- Elbows and tees
- Only 90° elbows
- Only 45° elbows
- Either all 90° elbows or a combination of 90° and 45° elbows
- Piping runs should not be placed in outside walls.
- True
- False
- Pump circulation can be stopped by air bubbles accumulating at a high point.
- True
- False
- Drops to downfed heat transfer units should connect from the ______ of the mains.
- Top
- Side
- Bottom
- Top or the bottom
- Complete the following statement: “Installing zones allows for ________________..”
- Lower installation cost
- Ease of installation
- Greater comfort
- Greater heat transfer
- Which one of the following factors is not a consideration when selecting zones?
- Heat losses
- System layout
- Use patterns
- Floor constructions
- In multi-storey buildings, why do the higher floors typically require less heat than the lower floors?
- Due to different use patterns between storeys
- Because they have additional insulation
- Because they use larger boilers
- Due to the stack effect
- Complete the following statement: “Rooms that may not be used for long periods should ___________.”
- Have double-glazed thermally broken windows installed
- Not have any heat transfer unit installed
- Be zoned separately
- Be sealed off
- Which one of the following rooms is normally kept at a higher setpoint temperature than the others?
- Dining room
- Living room
- Bathroom
- Bedroom
- Which one of the following rooms is normally kept at a lower setpoint temperature than the others?
- Dining room
- Living room
- Bathroom
- Bedroom
- Balancing is the process of what?
- Balancing flows in circuits
- Balancing temperatures in circuits
- Adjusting the control system
- Adjusting the pressure that enters a hot-water heating system
- How is the flow through each loop of a split-series loop system balanced?
- Adjusting gravity flow control valves
- Adjusting balancing valves
- Adjusting radiator valves
- The size of pipe used in each loop
Answer Key: Self-Test B-4.4 is on the next page.
